The part number is 1210Y5000393JET, and it refers to a CAP CER 0.039UF 500V X7R ceramic capacitor with the designation of 1210 - 0.039 µF ±5 500V. This component is suitable for use in various electronic applications due to its high capacitance value and reliability as specified by the X7R rating. The metric size of this capacitor is 3225, indicating its dimensions in millimeters. It is manufactured by Adibuja, a reputable supplier of electronic components.